5 min read Kubernetes is the de facto standard for container orchestration. Understanding its architecture, scheduling model, and operational patterns is increasingly expected […] Read article
5 min read Recommendation systems power product discovery at Netflix, Spotify, Amazon, and LinkedIn. Designing one at scale involves a multi-stage architecture that […] Read article
7 min read When to Use a Heap A heap (priority queue) is the right data structure when you need: the minimum or […] Read article
12 min read WebRTC Architecture Overview WebRTC (Web Real-Time Communication) is an open standard that enables peer-to-peer audio and video in browsers and […] Read article
12 min read Beyond Basic DP Once you’ve mastered 1D/2D tabulation and memoization (Fibonacci, LCS, Knapsack, Coin Change), advanced interview problems require recognizing […] Read article
13 min read Social Graph Requirements A social graph stores relationships between users (friendships, follows, connections) and enables graph queries: friends of friends, […] Read article
12 min read Notification System Requirements A notification system routes messages from producers (application events) to consumers (users) via multiple channels: push notifications […] Read article
10 min read Scala Interview Overview Scala is the language of Apache Spark, Kafka (originally), Akka, and many financial systems. Interviews at data […] Read article
10 min read Why Multi-Region Active-Active? A single-region active-passive setup (one primary region serves traffic, one standby region for failover) has two problems: […] Read article
10 min read What Is a Data Warehouse? A data warehouse (DW) is an analytical database optimized for reading large volumes of historical […] Read article